Ribbed insoles for welt shoes



Sept. 10, 1957 s. M. GRISWOLD 2,805,495

RIBBED INSOLES FOR WELT SHOES Filed Sept. 15, 1954 REBED INSOLES FGR WELT SHOES Stanley M. Griswold, Newton, Mass, assignor to B. B.

Chemical (30., Boston, Mass., a corporation of Massachusetts Application September 15, 1954, Serial No. 456,127

2 Claims. (Ci. 36-22) This invention relates to welt insoles.

An object of the invention is to provide an inexpensive welt insole of good quality.

In the procedure of making the insole, it is preferable to employ a matrix such as that disclosed in prior Letters Patent of the United States No. 2,577,750, granted December 11, 1951, in my name and that of Hans C. Paulsen, which comprises a flat insole-shaped body, in each fiat face of which there is a rib-receiving groove. Upon one of the flat faces is first laid a piece of sheet material having the shape of the matrix but enough smaller than the matrix so that a margin of the matrix of uniform width including the groove is exposed. The exposed face of the piece of sheet material is cemented.

A prefabricated ribbed strip of indefinite length is provided which has a rib portion and a flange extending from each side of the rib portion at the base thereof, one flange being preferably wider than the other. The rib of the strip is inserted into the groove of the matrix with the wide flange on the inner side and overlapping the cemented margin of the piece of sheet material. The wide flange of the ribbed strip is pressed against the cemented face of the sheet material to cause it to adhere strongly thereto to hold the flange down and prevent any objectionable wrinkling of the flange as the rib is progressively introduced into the groove of the matrix. After the rib of the ribbed strip is thus placed in the groove throughout its extent and the inner flange of the strip pressed firmly against the margin of the piece of sheet material, the ribbed strip is cut off, the matrix turned over and the described operations repeated on the other side. Then insole body layers at least as large as the matrix and cemented on their inner faces are placed one on each side of the matrix and the whole assemblage is subjected to heavy pressure. The body portions are then trimmed to the shape of the matrix and the insoles are removed therefrom.

The insole-shaped piece of sheet material may be a piece of strong paper, the best material for the purpose known to me being a commercial laminate of two layers of strong paper with glass fibers laid across the paper between the layers. In using this material the insoleshaped pieces are so cut from the laminated sheet that the glass fibers extend transversely of the insole-shaped piece.

The prefabricated ribbed strip may comprise two strips of canvas such as Gem duck. One strip cemented on both sides is folded upon itself to form a rib portion with the margins of the strip forming outwardly extending flanges, one at each side of the base of the rib portion, the flange on what is to be the outer side of the rib being narrower than the flange that is to be on the inner side of the rib. The second strip is cemented throughout on one side and for about half its Width on the other side. The marginal portion of the second strip, the opposite side of which is not cemented, is secured to the inner face of the folded rib portion of the first strip with its edge flush with the fold and to the Wider flange of the first strip, the marginal portion of the second strip which Patented Sept. 10, 1957 is cemented on both sides extending beyond the wider flange of the first step.

In the drawings,

Fig. 1 is a perspective view of a grooved matrix with the layer of sheet material smaller than the matrix placed upon it;

Fig. 2 is a similar View showing the rib of the ribbed strip being inserted into the groove of the matrix;

Fig. 3 is a cross-section of the matrix and insoles after the operations illustrated in Figs. 1 and 2 have been performed on each side of the matrix and the body portions pressed on each side thereof;

Fig. 4 is a sectional perspective of the matrix and insoles after the trimming operation;

Fig. 5 is a fragmentary sectional view on a large scale taken lengthwise of the layer of sheet material shown as applied to the matrix in Fig. 1;

Fig. 6 is a sectional perspective view of a fragment of a prefabricated ribbed strip of indefinite length; and

Fig. 7 is a sectional and perspective view of a fragment of the completed insole.

In making the insole of the present invention, a matrix 10 such as that shown in Fig. 1 is provided which has on each flat face thereof two hooks 12, 14, the points of the hooks extending in opposite directions. A thin insoleshaped piece of sheet material 16 smaller than the matrix is provided with holes 18, 24). In placing the material 16 upon the matrix the hole 18 may first be engaged with the hook 12 and then the hole 20 hooked over the hook 14, the size of the layer 16 and the location of the hooks and holes being such that a substantially uniform width of the margin of the flat face of the matrix, including a groove 22, will be exposed. The exposed face of the layer 16 is coated with pressure-responsive cement.

A prefabricated ribbed strip of indefinite length, such as that shown in Fig. 6, is prepared. It may consist of two strips 24, 26 of material such as canvas 01' Gem duck, the strip 24 being coated with pressure-responsive cement on both sides. The strip 24 is folded upon itself to form a two-ply portion 28 as wide as the desired height of rib, the marginal portions of the strip extending at about right angles to the portion 28 to form a narrow flange 30 and a wider flange 32. The second strip 26 is completely coated with pressure-responsive cement on one side and is secured by its cement coating to one side of the rib 28 with one edge flush with the top of the rib portion and to the flange 32 beyond which it extends for a substantial distance. The upper side of the flange 34 of the strip 26, as shown in Fig. 6, is coated with pressureresponsive cement only on that portion of the flange which extends beyond the flange 32 of the strip 24. Thus, when the insole has been incorporated in a shoe and the welt is being sewed to the upper and insole, there is no cement on the portion of the rib and adjacent portion which is engaged by the channel guide of the welt sewing machine and hence no cement thereon to interfere with movement of the shoe with respect to the channel guide.

The flange 39 may be slit, as shown at 31 (Fig. 2) to facilitate bending of the ribbed strip.

Starting at one end of the groove 22, the rib of the ribbed strip is pushed into the groove of the matrix, as shown in Fig. 2, the cemented portion of the flange 34 of the strip 26 extending over the cemented surfaces of the sheet material 16. The cemented portion of the flange 34 of the strip 26 is pressed upon the cemented face of the layer 16 so that the ribbed strip is secured in place as the rib-inserting operation progresses. When the end of the groove is reached, the ribbed strip is cut off and the operations of applying the layer 16 and inserting the ribbed strip are repeated on the opposite side of the matrix.

The cemented body portions or layers 36 are applied is applied to secure all portions of the two insoles firmly together. Thereafter the body portions 36, and it may be the flange 30, are trimmed to the shape of the matrix, ausing the edge of the matrix as a guide. The insoles are then pulled oil? the matrix, each appearing as shown in Fig. 7.

The sheet material 16 maybe paper and, as shown enlarged in Fig. 5, may consist of .two layers of paper 38, 38 with glass fibers 40 distributed between them and lying mostly in the same direction, the assemblage being secured together by a suitable adhesive. The pieces 16 :areiso cut :from the sheet that the glass fibers will extend transversely thereof to increase the transverse strength of the insole.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: i

1. An insole for welt shoes comprising an unchanneled body layer having one side coated with cement, a second layer smaller than said body layer and having one side coated with cement adjacent said one side of the body layer, and a rib strip composed of a first strip folded upon itself and providing a rib portion, an inner flange extending from said rib portion and secured by cement alone to the peripheral margin of the body layer, an outer flange narrower than said inner flange and extending from said rib portion and secured by cement alone to the peripheral margin'of the 'body layer, and a second strip completely coated with cement on one side and on the inner marginal portion of the other side only, said second strip having one edge flush with the top of the rib portion of the first strip with its completely coated side cemented to the inner side of the rib portion and to the inner flange of the first strip, the inner marginal portion coated on both sides lying between the coated surfaces of the body layer and the second layer.

2. An insole for welt shoes comprising an unchanneled body layer and a smaller layer of insole shape, an upstanding sewing rib having oppositely extending flanges at its base attached by cement alone to the body layer, and a strip cemented to the inner side of the rib with one edge flush with the top of the rib and cemented .to the inner flange of the rib, said strip having a portion extending between the body layer and the smaller layer and cemented to both layers.

References Cited in the file of this patent UNITED STATES PATENTS 615,069 Lawes Nov. 29, 1898 1,896,531 Valentine Feb. 7, .1933 2,052,661 Rockwood Sept. '1, 1936 2,398,277 Ayers Apr. 9, 1946 2,458,500 Bertrand et a1. 'Jan. 11, 1949 2,538,776 7 Griswold Jan. 23, 1951 2,673,995 Ridderstrom Apr. 6, 1954 

